<template>
  <div>
    <!--面包屑导航区域-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!--卡片视图区-->
    <el-card>
      <!--警告区域-->
      <el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>
      <!--步骤条-->
      <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!--tab标签页区-->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        :label-position="'top'"
      >
        <el-tabs
          :tab-position="'left'"
          v-model="activeIndex"
          :before-leave="beforeTabLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="cateProps"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!--渲染表单Item项-->
            <el-form-item v-for="item in manyTableData" :key="item.attr_id" :label="item.attr_name">
              <!--复选框组-->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox v-for="(cb,i) in item.attr_vals" :key="i" :label="cb" border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <!--渲染表单Item项-->
            <el-form-item v-for="item in onlyTableData" :key="item.attr_id" :label="item.attr_name">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!--图片上传区域-->
            <el-upload
              :action="uploadAction"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="uploadSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!--富文本编辑区-->
            <quill-editor v-model="addForm.goods_introduce" />
            <!--增加按钮-->
            <el-button type="primary" class="addButton" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!--图片预览区-->
    <el-dialog title="图片预览" :visible.sync="previewImgVisible" width="30%">
      <img class="previewImg" :src="previewImgUrl" alt="预览图片" />
    </el-dialog>
  </div>
</template>
<script>
import _ from 'lodash'
export default {
  data() {
    return {
      //tab标签、步骤条的索引
      activeIndex: '0',
      //增加数据对应的表单
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: [],
        pics: [],
        goods_introduce: '',
        attrs:[]
      },
      //增加基数据对应的校验规则
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' }
        ]
      },
      //商品列表数据
      cateList: [],
      //商品列表的配置
      cateProps: {
        expandTrigger: 'hover',
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      //动态参数列表
      manyTableData: [],
      //静态属性列表
      onlyTableData: [],
      //图片上传的路径
      uploadAction: 'http://127.0.0.1:8888/api/private/v1/upload',
      //上传图片对应的header
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      //预览图片的url
      previewImgUrl: '',
      //预览弹框显示与否的弹框
      previewImgVisible: false
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    //获取商品分类列表
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类列表失败!!!')
      }
      this.cateList = res.data
      console.log(this.cateList)
    },
    //商品分类变化
    handleChange() {
      console.log(this.addForm.goods_cat)
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    //切换tab页面的时候触发的函数
    beforeTabLeave(activeName, oldActiveName) {
      console.log('即将离开的标签页名字:' + oldActiveName)
      console.log('即将进入的标签页名字:' + activeName)
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类!')
        return false
      }
    },
    //点击tab页的时候触发的函数
    async tabClicked() {
      console.log(this.activeIndex)
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: 'many' }
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('获取动态参数列表失败！')
        }
        res.data.forEach(item => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        console.log(res.data)
        this.manyTableData = res.data
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: 'only' }
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('获取静态属性列表失败！')
        }
        // res.data.forEach(item => {
        //   item.attr_vals =
        //     item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        // })
        console.log(res.data)
        this.onlyTableData = res.data
      }
    },
    //图片预览对应的方法
    handlePreview(file) {
      console.log(file.response.data.url)
      this.previewImgUrl = file.response.data.url
      this.previewImgVisible = true
    },
    //图片移除对应的方法
    handleRemove(file) {
      const tmpPath = file.response.data.tmp_path
      const picIndex = this.addForm.pics.findIndex(item => item.pic === tmpPath)
      console.log(picIndex)
      this.addForm.pics.splice(picIndex, 1)
    },
    //图片上传成功对应的方法
    uploadSuccess(response) {
      console.log(response)
      const picObj = { pic: response.data.tmp_path }
      this.addForm.pics.push(picObj)
      console.log(this.addForm)
    },
    //添加商品
    add(){
      console.log(this.addForm);
      this.$refs.addFormRef.validate(async valid => {
        if(!valid){
          return this.$message.error("请填写必要的输入表单项!");
        }
        //执行添加的业务逻辑
        const form = _.cloneDeep(this.addForm);
        form.goods_cat = form.goods_cat.join(",");
        //处理动态参数列表
        this.manyTableData.forEach(item => {
          const newInfo = {
            attr_id:item.attr_id,
            attr_value:item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo);
        })
        //处理静态属性
        this.onlyTableData.forEach(item => {
          const newInfo = {
            attr_id:item.attr_id,
            attr_value:item.attr_vals
          }
          this.addForm.attrs.push(newInfo);
        })
        form.attrs = this.addForm.attrs;
        console.log(form);
        const {data:res} = await this.$http.post("goods",form);
        if(res.meta.status !== 201){
          return this.$message.error("添加商品失败!");
        }
        this.$message.success("添加商品成功!");
        this.$router.push('/goods');
      });
    }
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length == 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>
<style lang="less" scoped>
.el-checkbox {
  margin: 0 10px 0 0 !important;
}
.previewImg {
  width: 100%;
}
.addButton{
  margin-top: 15px;
}
</style>